Air-valve control for carbureters.



I www A. DE GLMRMQNT,

m VALVE CONTROL ma GARBURETBRS,

APPLATIN FILED JUNE 2B. 1913. L @$673, Paeute Nov. 10, NM1.

2 SHEBTS-SHEET lt A. DE GLAIRMON'T.

OIR VALVE CONTROL FOR OARBURBTERS.

APPLICATION FILED JUNE 28, 1913.

Patented NOV. i0, 191%.

SHEETS-SHEET 2.

llillll'iF DE LAli'RlNT, GF TOLEDO, Cil-i110.

specification of Letters Patent.

Patented Non. tu, i9?! t Application tiled fune 28, 1913. Serial No. 776,5519.

iinprm'einents in carbureters and more par* ticularly to means tor automatically controlling the supply ot' auxiliary air to the earlniri'eter, the primary object oi my invention being the provision ot' a spring held .auxiliary air valve mechanism so arranged that the springs controlling the opening oi the valve may be adjusted to vary their ten sion in such a manner that the valve will automatically admit the passage of thi` proper proportionate amount of air to the tarbiireter7 irrespective of the speed at which the engine is running and consequently oi" the aniount of gasolene admitted. Hereto7 tore auxiliary air' valves oi: the above described type have been employed in which the opening of the "alve is controlled by two springs, a low speed spring and a high speed spring, the former being' the weaker and being; the one which normally holds the valve closed and which controls the amount to which the valve shall open when running at tow speed and the latter beingarrangedto be taken up after the valve is partially opened to control its further opening When the eroine is running at high speed. ln air valvefl constructions of thev above character means have been provided for adjusting the tension of the low speed spring to permit the valve to initially open at any desired speed. No. provision has, however, everbeen made for varying the tension of the high speed spring to provide an adjustment by which the opening oi the air valve at high engine speeds may he controlled.

Speciiically then,' the chiel object of my present invention is the provision oit' means for varying,r the tension ol' this high speed spring without in any Way affecting its usual ogferation or interiering.;F with its ac tion as a take up spring.

still further object ot' my invention is toeprovide, in connection With'the above adjustable controlling;r mechanism for the auxiliary air valve5 means for suprilyimfgr heated I'555, air to the port of the auxiliary air valvel i from an air jacket'about the exhaust mani `told ol. the engine, the muiiier or other suit` able heated part of the engine structure. [ind a. still 'further object ot' my invention to provide a controllin niechal'iism and heated air supply system which may be einployed upon carbureters having an auxiliary spray nozzle valve arranged to be opened and closed by the movement ot' the auxiliary air valve without in any way aiiecting the actuation oli' said spray nozzle valve by the air valve.

`Witli these and other objects iii-view, my invention will be more tally described, illus trated in the accompanying; drawings, and then. specifically pointed out in the claims which are attached to and form a partici' this application. y

ln the drawings: Figure l is a fragmen tai-v elevati onalview oi a conyentional :torni o1!E carburetor, showing my improvement ap plied thereto, portions being shown in sec tion to more clearly show the construction and relation oi." the various harte; Fig. 2 is a similaiview illustrating the employment o1" my controlling mechanism with a slightly different form of carburetor. Fig. 3 is a detail sectional view, illustrating a modified form of valve stemstructure.,

Corresponding and like parts are referred.' tov in the following description and indio-steffiV in all the views of the drawings by the same reference characters.

ln order to clearly disclose the construe tion and operationA ot my improved con trolling;v mechanism for auxiliary air valves ot' carl'mreters l. have illustrated the saine in connection with two well lrnown types of czfu'bureters, one oi which, in addition to the auxiliary air supply valvegvis provided with. an auxiliary gasolene nozzleand the other of which is .identical with the former with the exception Vthat it has but one gasolene nozzle, namely, the usual primary nozzle. lit will bo understood, however, that my iniprovedcontrolling mechanism may be ein ploved, with slight structural changes with-- in the scope of a mechanic or designerislrilled in the art, with many forms `and types oi" carhuretors other than those here shown.

Referring first to the carliureter shown in Fin'. l oi the dra w'ings,l0 indicates Vthe main body olthe carbureter, the same beiugnshown in' elevation as the constructionand arrangement of the primary spray nozzle, carburetinlg and mixing chambers and other parts contained therein are of a conventional and well known type needing no illustration. The body or casing l0 is extended at one side as at ll to provide a casing tor an auxiliary air supply valve7 this casing' being hollow' to provide a chamber 'l2 communiciting;l with the mixingy chamber of the carhureter through a passage i3 into which tends the secondary or auxiliary sprayv notzle ll. rhe opening' of this spray nozzle is controlled by a neeole valve l5 normally held in closed position hy a spring' lli and having a valve stein 'lf extending' through the top el the easing` ll. and terminating in a head 18. This spray nozzle, together with its controlling valve, is of common type and no further description ol the same is deemed necessary.

The upper wall of the valve casing ll is ported in the usual way to permit the pas` sage of air into the carhureter, the port being normally closed hy an auxiliary air valve 19 mounted upon a. valve stem Q0 which extends by its ends through the upper and lower Valls ot the casing ll. The lower wall of the casing ll is provided with a. relatively large open` ing through which the valve stein passes, this opening being` surrounded hv an internally threaded nipple 2l. A sleeve surrounds the nipple, being tree for turning movement thereabout and secured within. this Sleeve and against movement` independ ent thereof, is ari-adjusting plug Q3, the upper end et which is threaded to engage the threads et the nipple. A helical springy '24 surrounds the valve stein 2O hearing h v one end against the plug' Q3 and hy its other end against the. valve 19 to normally hohl the latter in elevated position against its -seat and so prevent the entry ot' air. lt will be readily apparent that the sleeve 22 may be turned manually in either direction to raise or lower the plug 273 and so vary the tensionl of the;` soring'fll and control the opening of the valve lll. ln order-to lock the sleeve in adjusted position, the casing ll is provided with a downwardly' depending' lug 25 'carrving" a springr 'pressed locking pin 26, the tree end ot which is adapted to seat in'ono or another of a pluralityY of lougitudinally extending grooves-.Qi formed in the peripheral tace of the sleeve. The upper wall oi" the casing;v ll is provided about the port with an upst'andine, circular flange Q8 and with spaced perforated ears QQAbetWeen whichjis pivoted a lever 30. One end of this lever hifurcated to form spaced ears :ll engaging one upon either side of the valveFstcm Q0, While the opposite end is similarly bifureated lo form spaced ears '32 extendingl one upon either side of the valve stem lT` the said lever 250 being;r so' mounted that when the auxiliaryT spray nozzle valve l5 is completely closed the head 1S of the valve stem rests upon the lever which then occupies the position shown in the draivir casing;r 33 is seated hy its lower end within the flange Z8 ot the casing; "il and consequently surrounding the auxiliary air port and valve and termed integfrallyv iv' in the upper end of this casing; or secured thereto iu any suitaole manner` a )ipe which leads from any suitable source et heated air supply such as an air jacket about the. haust. manifold ot' the engine or about the muli'ler. This casing' is provided int rmediate its length i,vini a pair oit' transversely extending spaced spiders both being provided with a relatively large central opening'` 'One wall ot the casing 3L-3 is provided with an opening Whichis normally closed by a hinged door El?, this-open ing' extending from point considerably above the upper spider 36 to a point slightly below the lower spider lt will be ap parent that when engine is running at sul'licientspeed to open the auxiliary air valve 19, air will he drawn iu through the pipe and casing; through the air valve and so to the mixing chamber of the carhureter. i

rl`he opening;` termed centrally in the spider l5 is threaded to receive the threinied portion oi a cylindrical sleeve 3S which is open at, its upiiei' end and closed 'atits lower end as at 39, the lower end ol' the sleeve heine' provided with a radially extending pra'ipheral liange lll, the tace ot which t milled to' perinit ready manual turningv olE the sleeve to raise and .lower the saine through the spider ,El second sleeve ll has its open lower end telescopically 1nountedin the open upper end ot' the first sleeve and has its closed upper end #l2 normally held against the lower tace ot the. spider 3u hy a helical spring llanounted within the sleeves B8 and ll and hearing' hv its ends against the closed ends S9 and thcreo'l". Said closed ends are provided with alined openings tor the passage olf a supplemental valve stem' -l-l, the lower end ot 'which is enlarged to Al'orm a head l5. This head is provided with a socket to receive the upper end ot' the valve stem El), the valve stein and supplemental stem lieing connected hy a threaded pin or other suitable 'Fastening device lli. i The upper end of the supplemental valve stein '4l extends 'throug'lithe opening in the closed end l2 of the sleeve ll and through the @entrai opening ot thespider 36, being threaded to and 35,

tttetote adjusted position. The connection between the valve stem 20 and supplemental stem tl is such that the latter may he adjusted with rospeot to the 'former to vary the extent to which the former must move het'ore the head ot the .latter will engage the lever 2550 to open. the auxiliary nozzle valve. lf desired, it will of course he apparent that the valve stems 20 and -iamay he replaced hy a single'valve stem, shown vin Fig. 2i', in which instance the valve stein thus provided Yill he threaded at a point iinrnedi ately below its passage through the eloseifl lower end ol the sleeve 38 to receive an ed justing nut which may he moved toward and away from the lever the same adjustment aeeoinplishedv hy the sooheted head lf3 and pin Lit.

lhe operation oi the :more dei lhed oar hureter, jimrtieularly that of my improved auxiliary air valve controlling 3 ohanism, will he readily understood troni the drawings and hut slight description oil2 the sume is necessary. When the engine is running at low speed, suilioient air will he drawn in through the main or primary oir supply port ot the carburetor and the valve and coi'isequently the auxiliary .spray nozzle valve l5 will both remain Closed. its the speed of the enginev increases liowever, air will be drawn in through the pipe {il} and easing loreiug the aus lary air valve i9 open a slight distance against the action of the spring,1 which is the low speed spring' ot' the auxiliary air valve. The gradual further increase in engine speed will still further open theyalvev i9 until the head of the supjilemental valve stem depnesses the lever 30 to open the auxiliary spray nozzle valve l5 and thus admit an additional amount of gasolene, thisgasoiene, together with the auxiliary air admitted through the valve 19, passing directly into 'the mixing chamber o'l.z the earhureter. its soon as the engine begins to run high speed the valve 19 will he open to such an extent that the adjusting nut l? will engage against the closed upper end 42 ot the sleeve l-l. From then on, all turther opening oiE the Valve i9 'is not only accomplished against the notion ol? the spring 24 but also' against the action of the springr t3. As both the springs 2t and t3 are capable of independent' adjustment, it will he apparent that the parts may be so adjusted that the auxiliary' air valve 19 will he opened to any desired extent at any de- 'n v srreol speed ot the engine. Because ot this the auxilio ry air valve, when onoe properly adjusted, `|will he automatic in its .action supplying exactly the right proportion of auxiliary air to the oarhureter to eornlhine with the amount ot' gasolene admitted at the speed at which the engine is running to movido a pert'eot combustible `niilftture tor lll to aoeoinplish.

parent that both ot these adjustments may he readily sind conveniently inode oy opening the door 3'?.

The construction shown in litiga 2 or the drawings is identical with that shown inl, with the exception that the ouiIiliary spi-:ry nozzle and its valve are omitted, together 'with the lev r 30. lt will therefore he apparent that with this torni oit construetiou. if the valve stem Q0 and supplemental stein el are replaced by a single valve stern, surh valve stero need not he threaded intermediate its length to receive the adjusting; nut mentioned in the description of the oonstruction shown in Fig. l. ln this instance, as in the former, the auxiliary air passing througggh the valve 1.9 is admitted directly to the mixing Chamber of the carburetor'.

llr'ivinp; thus desfrihed the inreI1tion,vvha-t is claimed as new is:

l. it, carburetor including a single' euxiliery air valve, a low speed spring control'- ling the opening of saidvalve, a high speed springn brought into play after partial openn ing' of said valve to control its further opening, and means for adjusting the tension of the high speed spring.

l 2. A oarhureter including' a single auxiliary a ir valve, low :ind high speed springs controlling the opening of seid valve, the latter becoming operative only Utter partial (awning),l of the valve, and means for independently adjusting the tension of said springs. y

3. A carburetor including an auxiliary air valve, :1 sjiring normally holding' said valve in closed position, means for adjusting the tension of said spring, a seeond spring aranged to become operative only when the vulve has heen partially opened against the first spring to act against further opening, and means for adjusting the tension of said second spring.

rlhe combination with a carburetor hadriupn an auxiliary air valve easing and air titl valve mounted therein, the air valve having a stem extending through the top of the casing, meansvlor normally and yieldably holding the valve against its seat, o spring engaging about the valve stem and normally having rio-effect on the Yvalve, means for tensioning the spring, and means carried by the stem for engagement with the spring only after partial opening of the valve li., The combination with a carhureter having an auxiliary air valve casing, a valve mounted in the easing, a spring engaging the valve to normally hold the same closed,

of n, miveisem cx 'fried hy the valve and ex- 'x i .f

l thfong'h the easing, spiders snppoilzf in spaced ieiziion above the easing, a sleeve fhreznieifi hrough one of the spidelS f viod ai one end, a Second Sleeve hearhaving an open end extending Within n ei f the first. i spying sini'ound- Siem and located Within the eoinpiessed heiween he closed and i nnb adjustnhiy thremled f ,"1 senx for eng; igei1'1ent against e Sleeve upon partial opening 0i' nhinntion vwith o, carinii-eter nmingV in nuxiiiziijy ail' vulve und nn auxiiiai'y so my nomi@ vom@ of n miie stein for the Xiiini'y nii waive, menne for noiniuiiy ing the auxiliary nir vulve stein to hold Live in closed position. means operable A pni'igini opening oi ehe uuxiiizz y ail: im' mening .fhe spiuv nozzle mim, a 'nig fe-v. Ling with the who Stein after i o Lening of *die valve, and means forv he Leneion of @uid spring.

ing an auxiiiiuy xiii' Valve and an auxiliary spiny 'nozzle mim, of a valve Stem or the n eioszeii end against ihe other sgifieiV :4.,1 1eme auxiliary nir valve, means for normally holding the auxiliary uii Valve stein to hold its vulve in closed position, means opeahie by the partial opening oi" the nuiiiiiarj nir Valve for opening the Spray nozzle vulve, n spring' iwi-noting wih the who stein after pai-fini ope of the valve, ineens 'for ndjusting the tension of said l spiking, und means; for varying the extent io which the :xii: vuh'e may open hefoi'e Said spring he comes 11e-Live,

S. The eonioinnhion with :1 carhureter having an nuxiiimy :iii' vulve anda low speed. spring' Contoiiing the opening of the Yaive, oi Valve stem, 1eiescopie sleeves inonned about the valve siem, he valve stein being mov: hie therethrough, n heiieai Spring conipi-esfsed between the ends of said sleeves,

to the other to tension the spring, and means xc'ijuistahie upon the vulve siem for engage ment with one of said sleeves.

in testimony whereof i aiiix my signature in presence of two Witnesses,

DOLFO Di; CIRMON Q. [Le] Vitnesses E. M. KEENATH? LEROUX.

menne for adjusting one Sleeve Witi'ileSpeCt' 

